Fire-proof floor



(No Model.) v

J. BOSSYNS.

FIRE PROOF FLOOR. No. 319,670. Patented June 9, 1885.

14 @Wj/#7% y y [f5/KM Attorney.

NITED STATES ATENT risica.

JOSEPH BOSSYNS, OF BALTIMORE, MARYLAND.

FIRE-PROOF FLOOR.

SPECIFICATION forming part of Letters Patent No. 319,670,1dated June 9,1885.

Application tiled January 8, 1885. (No model.)

To all whom it may concern:

Beit known that I, JOSEPH BossYNs, a citi- Y zen of the United States,and a resident of the city of Baltimore, in the county of Baltimore andState of Maryland, have invented certain new and useful Improvements inFire- Proof Floors, of which the following is a full, clear, and exactspeciiication, reference being made to the accompanying drawings, suchas will enable any one skilled in the art to which my inventionappertains to construct the same. y

In the drawings similar letters of reference are used to indicate thesame parts in different gures.

Figure l represents one arch andv a section of two girders. G G aregirders. S S are skewbaoks of the arches set upon the girders. B is ablock, and K is the key of the arch.

ln Fig. 2 the arrangements of the parts of the arch are reversed-S, Fig.l, beine a short skewback, and in Fig. 2a long one; S in Fig. l beinglong, and in Fig. 2 short. So, also, one block B is on the lett of thekey in Fig. 1 and on the right in Fig. 2, whereas B B are on the rightin Fig. 1 and on the leftin Fig. 2.

Fig. 3 is a top view offthe floor, showing the alternate arrangement ofthe blocks.

My invention relates to that class of floors made ot' iron girders andarches of a Jrire-proof material; and the special feature whichconstitutes my invention is the arrangement of the blocks forming thosearches in such a position in relation to the blocks forming contiguousarches as to cause the door composed of a number of arches combinedtogether to be much stronger than any heretofore used.

H eretotore tire-prooi iioors have been made oftlat arches constructedin many ways, prominent among which is a floor consisting ot' a seriesot' identical hollow arches, the hollows being perpendicular to thegirders or in the direction of the thrust of the arch. The result ofthis arrangement was to produce a iioor consisting of a series of hollowarches, in which the keys were all in the middle and the blocks in thesame relative position on either side, so that the joints between theblocks ran in a continuous line from one end of the floor to the otherparallel to the girders. Experience has shown that this form of archwill settle and the joints separate under heavy pressure.

My invention is designed to remedy the defects in this floor, and may besaid to be an improvement upon it, because I use the essential 'featureof that door-namely, the hollow perpendicular to the girder, and whichis p atented to A. Beckwith, No. 151,826, June 9, 1874, Improvement inFire-Proof Floors.77

I construct my floor with the hollowsinthe blocks running at rightangles with the girders, in such a way that the joints between theblocks of the arches will never fall together, but always against thesolid side of a block in the arch on either side of it. By this method Iaccomplish a twofold result: by making an arch ot' a cylinder of cementplaced at right angles with the girders and with its ends .resting uponthem a given quantity of materlal is used to the greatest possibleadvantage, and, secondly, by arranging the blocks ot' the adjacentarches in such a manner as to break joints with one another. Thiscombination, which has never been made before, makes a floor which iscapable of sustaining a much greater weight than any other in use.

The method ofapplying my invention shown in the drawings is one which inpractice I have found successful, and I therefore give it as one methodby which my invention may be successf'ully put into practice.. y

What I believe to be new, and desire therefore to secure as my inventionby Letters Iatent, is

A lire-proof floor consisting of iron girders, incombination with two ormore sets of independent arches of suitable size and material, andhaving hollows running at right angles with the girders, in which theblocksvforming adjacent arches break joints with each other.

In witness whereof I have hereunto set my hand and signed my name this29th day of November, 1884.

JOSEPH BossYNs.'

Witnesses:

CHAs. D. STIGKNEY, Jr., JAMES L. STEUART.

